Investigating the behavior of concrete shear wall with coupling beam under blast load

Many existing structures are vulnerable to the loads caused by blast waves; therefore, their resistanceto such loads should be increased. An explosion is a rapid release of energy in the form of light, heat, sound,and shock waves. The shock wave consists of highly compressed air that propagates radially and withultrasonic speed from the surface of the explosive material to the surrounding environment. As the shockwave expanded, the pressure caused by the shock also decreased. When the wave in the path of theexplosion reaches the obstacle surface, it is reflected, and the pressure caused by the explosion is multiplied.Damage caused by shock waves can occur in two ways: direct effects caused by explosions and effectscaused by progressive damage. Shear walls are structural systems used to resist dynamic loads such asexplosions, earthquakes, and wind loads. In this study, the behavior of a shear wall with a coupled beamunder different blast loads was studied. In this research, two shear wall models with ۱.۲ and ۳ meter lengthsof coupling beams and ۰.۵ and ۱ meter heights of coupling beams with two thicknesses of ۰.۲ and ۰.۳meters under two loads of ۱۰ and ۲۰ kg of TNT at a distance of ۱ meter are investigated. . Subsequently,the displacement and energy values in the different states were investigated. By examining the results, itcan be seen that in the behavior of the concrete shear wall system with the coupling beam, increasing ordecreasing the length of the coupling beam has a greater effect than increasing its depth or thickness againstblast loads.

Keywords:

concrete shear wall , coupling beam , blast , damage